66 years old, Master Plumber for 45 years and can honestly say I have never used Algabra for anything! To me its like learning French, whats the point!!
GFY.
So? He never took Algebra, so he doesn’t think he uses it, but he does.
If you had an education or understood plumbing at all you would know this.
He is more of an American than you ever will be, and deserves self-governance regardless if he understands what Algebra is, no matter how much you stomp your little feet and demand he be subjugated for his ignorance of Algebra.